I am trying to get top swap space consuming processes in my for loop.
I got multiple way (using /proc FS) however have anybody used top command in for loop? Using /proc FS giving solutionbut itrs more complex. Please suggest if anybody has simpler solution

Once you have saved the settings to .toprc using W option, then you don't have to use option O & p anymore. Your top command will always display processes sorted by SWAP usage. Please give it a try and see if you are getting the desired result.